F-positive bacterium


noun, plural: F+ bacteria

A bacterium with F factor existing as a plasmid and not integrated in the bacterial genome.


The F in F factor stands for fertility and the presence of F factor as a plasmid is the distinctive feature of F+ bacteria. During conjugation, F+ bacterium transfers a copy of F factor DNA with F- bacterium, making the latter capable of producing a sex pilus and thereby also making it capable of conjugation with other bacteria.

Compare (with other groups of bacteria in terms of F factor):

See also:

Please contribute to this project, if you have more information about this term feel free to edit this page

This page was last modified on 3 August 2010, at 08:23. This page has been accessed 4,042 times. 
What links here | Related changes | Permanent link